It’s been years since I’ve seen this happening. Sadly it does occur. When General contractor companies hire in fake plumbing moles to try to swindle your cost down. The more you find out about these ” fly by nights ” generally they are all just trying to work around the City’s laziness of ” above my pay grade ” attention to details. Plumbing Contractors in Idaho have to deal with both the City’s first and this bad for business last. Either way the trouble starts when someone opens up there mouth. Plumbers be careful out there. These out of state fake Plumbers are being hired by in house GC to find a plumber waiting to be caught in their game and the City’s ( experienced it myself ) don’t care who or what they do to the plumbing portion of your work.